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Paraffin/iron tailing ceramic composite phase change energy storage material and melt and infiltration preparation method thereof

A phase-change energy storage material and ceramic composite technology, which is applied in the field of material science and engineering, can solve problems such as difficult production of sintered brick concrete and small particles, and achieve good thermophysical and mechanical properties, high content of phase-change materials, Good impregnation effect

Active Publication Date: 2017-08-04
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

First of all, fine-grained iron tailings are too small to be used in the production of sintered bricks and concrete, etc. Currently, they can only be piled up for storage

Method used

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  • Paraffin/iron tailing ceramic composite phase change energy storage material and melt and infiltration preparation method thereof
  • Paraffin/iron tailing ceramic composite phase change energy storage material and melt and infiltration preparation method thereof
  • Paraffin/iron tailing ceramic composite phase change energy storage material and melt and infiltration preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Iron tailings: The raw material used in this example is the mud-like fine-particle iron tailings produced by Beijing Miyun Shouyun Mining Group Company in 2015 after iron ore selection, with a particle size distribution ranging from 0.1 to 160 μm. The particles 2 , 14.7wt.%Fe 2 O 3 , 8.7wt.%MgO, 6.8wt.%Al 2 O 3 , 6.6wt.%CaO, 1.6wt.%K 2 O, 1.5wt.% other ingredients.

[0037] Paraffin wax: The phase change material used in this example is Kunlun brand paraffin wax produced by Daqing Petrochemical Company, with a melting point of 54-68°C and a phase change latent heat of 182.10 J / g.

[0038] Weigh 45 g of iron tailings powder, 90 g of agate balls, and 55 ml of deionized water, put them into a ball mill tank and mix them for 22 hours with a roller ball mill to prepare a slurry with a tailing content of 45 wt.%. Weigh 5.5 g of organic monomer, 0.55 g of cross-linking agent and 0.8 g of dispersant into the slurry and continue ball milling for 2 hours. Weigh 0.1g foaming agent and ...

Embodiment 2

[0044] Iron tailings: the raw materials used in this example are the same as those in example 1.

[0045] Paraffin wax: The PCM used in this example is the same as in example 1.

[0046] Weigh 30 g of iron tailings powder, 60 g of agate balls, and 70 ml of deionized water, put them in a ball mill tank and mix with a roller ball mill for 6 hours to prepare a slurry with a tailing content of 30 wt.%. Weigh 7g of organic monomer, 0.7g of crosslinking agent and 0.2g of dispersant into the slurry and continue ball milling for 12 hours. Weigh 0.15g foaming agent and 0.04g foam stabilizer into the slurry, and mechanically stir for 20 minutes at a stirring speed of 650r / min for foaming. Weigh 1.75 g of catalyst and 0.3 g of initiator into the foam-containing slurry and stir evenly, pour the slurry into a glass mold, and release the slurry after gel formation and dry. Put the formed body into a muffle furnace, heat up to 900°C for 2 hours, then heat up to 1050°C for 12 hours, to prepare i...

Embodiment 3

[0049] Iron tailings: The raw material used in this example is the mud-like fine-particle iron tailings produced by Beijing Miyun Shouyun Mining Group Company in 2016 after iron ore selection. Its particle size is between 0.3 μm and 200 μm, and the diameter is The particles 2 , 13.5wt.%Fe 2 O 3 , 9.6wt.%MgO, 8.9wt.%Al 2 O 3 , 7.2wt.%CaO, 2.8wt.%K 2 O, 1.7wt.% other ingredients.

[0050] Paraffin wax: The PCM used in this example is the same as in example 1.

[0051] Weigh 40 g of iron tailings powder, 80 g of agate balls, and 60 ml of deionized water, put them in a ball mill tank and mix them for 12 hours with a roller ball mill to prepare a slurry with a tailing content of 40 wt.%. Weigh 4g of organic monomer, 0.4g of cross-linking agent and 1.8g of dispersant into the slurry and continue ball milling for 10 hours. Weigh 0.08 g of foaming agent and 0.02 g of foam stabilizer into the slurry, and mechanically stir for 15 minutes at a stirring speed of 900 r / min for foaming. Weigh 1...

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Abstract

The invention discloses a paraffin / iron tailing ceramic composite phase change energy storage material and a melt and infiltration preparation method thereof. The composite material is prepared from the following raw materials in percentage by volume: 70 to 85 percent of paraffin and the balance of iron tailings. The composite phase change energy storage material provided by the invention has the advantages of high solid waste utilization rate, high phase change material content, high energy storage density, good mechanical property, low cost and the like; after large-scale application, the peak load shifting of energy sources can be realized; the pressure of the iron tailings on ecological environment is relieved; meanwhile, the heat conduction performance and the energy storage efficiency of the phase change material are effectively improved. The invention also discloses a melt and infiltration preparation method of the paraffin / iron tailing ceramic composite phase change energy storage material. The process parameters of the method are controllable; the operation is simple; the production period is short; products with complicated structures can be prepared.

Description

Technical field [0001] The invention relates to the field of material science and engineering technology, in particular to a paraffin wax / iron tailing ceramic composite phase change energy storage material and a melt infiltration preparation method thereof. Background technique [0002] In the field of clean energy utilization such as industrial waste heat recovery and solar energy, in order to better match the time of energy supply and demand, the development and utilization of thermal energy storage materials are essential. Among them, latent heat storage is one of the most effective ways of thermal energy storage. Phase Change Material (PCM) is a material that utilizes the heat absorption and heat release characteristics of substances in the phase change process to store and release energy. Its large-scale application can significantly improve the efficiency of energy use. [0003] The sensible / latent heat composite energy storage material (Composite Energy Storage Material, CES...

Claims

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Application Information

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IPC IPC(8): C09K5/06C04B38/10C04B33/132C04B33/32
CPCC04B33/132C04B33/1328C04B33/32C04B38/10C04B2235/6023C04B2235/656C04B2235/6567C04B2235/658C09K5/063Y02P40/60
Inventor 周洋李润丰孙智勇郑涌李世波李翠伟
Owner BEIJING JIAOTONG UNIV
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